Nut-lock.



' J. GDYLB.

NUT LOCK.

AAAA ICATION FILED 11u21 1912.

1,04%5 1 6, i Patented 001. 8, 1912.

JAMES COYLE, 0F TREIVIONT, PENNSYLVANIA.

NUT-LOCK.

Specification of Letters Patent.

Patented Oct. 8, 1912.

Application filed May 21, 1912. Serial No. 698,749.

To all whom, t may concern:

- Be it known that I, JAMES Conn, a citizen of the United States, residing at Tremont, in the'county of Schuylkill and State of Pennsylvania, have invented a new and useful Improvement in Nut-Locks, of which the following is a specification.

This invention relates to that type of nut locks in which the lock is carried by the nut, and includes mens for releasingthe lock so that the nut can be removed from the bolt.

The invention consists of the novel fea.- tures of construction hereinafter described, pointed out in the claims and shown in the accompanying drawings, in which,

Figure 1 is a view of the inner face of a nut provided with my locking device, parts vheilig shown in Vlocking position and a. bolt being shown in cross section. Fig. 2 is a similar view the parts being shown 1n unlocked position. Fig. 3 is a transverse section through the nut upon the line 3 3 of Fig. 1. Fig. 4 is a side view. ln these drawings 1 represents a bolt of the usual type and 2 a nut which upon one face is provided with an annular recess 3 surrounding the usual'bolt opening. Upon one side of the nut the wall :of this recess is slotted as shown at 4. Within said recess and adjacent said slot is secured an end of a semi-circular spring 5. The opposite end of said spring is bent inwardly as shown at 6 and forms a locking pawl of suflicient width to always engage a bolt thread. Secured to said pawl is -a pull wire 7, said wire extending outwardly through the slot 4.-. The outer portion of the wire is bent back upon itself, and then curved slightly so that when the same is lifted it will ride over one edge of the slot and rest upon the outer faceof the nut, as shown in Fig. 2. The'loop 8 thus formed by bending the Vwire 7 back upon itself serves therefore the double purpose of a handle by means of which the pawl 6 can be drawn out of engagement with the'bolt threads and it also serves as a looking means holding said pawl out of enagement with the threads of the bolt as mg as the curved outer end of the loop is 'the nut will turn freely in engagement with the exterior face of the nut. By pushing this curved end back into the slot 4 the pawl 6 will again spring into engagement with the bolt threads and while totighten it, it cannot be turned in the reverse direction, that is to loosen it, until the pawl has been drawn out of engagement with the bolt. It will be noted that the slot l communicates with a pocket 4 and the shoulder thus formed is provided with a beveled edge upon which the angled end portion of the loop 8 rides when the nut is to be unlocked from the bolt. I also preferably notch the' threads of the bolt at suitable intervals as shown at l, thereby enabling the pawl to j rtain a positive hold upon said bolt, thus making a positive lock.

What I claim is: 1. The combination with a threaded bolt, of a nut adapted to work thereupon, said nut having an annular recess surrounding the bolt opening and-having a slot leading from said recess to the outer face of one side of the nut and having a shoulder therein, a spring secured in said recess aud having an end bent to engage the bolt threads, andapull member having one end secured to said pawl and the other end bent back upon said pull member, said pull member projecting through the said slot and adapted to be brou ht into engagement with said shoulder for t e purpose ot holding the pawl out of engagement with the bolt.

2.A nut lock comprising a threaded bolt, a nut having one face recessed, a spring seated in said recess, said spring partially encircling said bolt, and having one end bent to form a pawl of suflicient width to always engage a. thread of the bolt, said nut having a slot opening through one side of the nut and communicating with said recess and a pull member working through said slot and secured to said pawl.

3. The combination with a threaded bolt of a nut recessed upon one face, and having a Slot extending through one side of the nut into said recess, said slot communicating" with a pocket, a beveled shoulder forming vfion adapted to el thev thl'eads of 'the from the bolt.

JAMES COYLE.

one side of said pocket; a spring Secured in the recess and havmg an angled. end pob bot-5 :md a pull member connected at one end Said pawl said pull member extending through Said so m being adapted to move into said pocket and is engage said shoub fitnesses r M. J. FLEMING, E. J. POWER.

Copies ls paient may be obtained for ve cents nach, by addressing the Gomnssoner of Eatents, washngon, l?. 7. 

